Percentages: The most useful statistics ever invented
Example: There are 20 students in a classroom, 12 of whom are males and 8 of whom are females. The percentage of males is 12 “out of” 20, or 60%. The percentage of females is 8 “out of” 20, or 40%. (20 is the base.) To how many decimal places should a percentage be reported? ................
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